银河系结构的再认识——1.内区的棒结构

Barlike structure in the inner Galaxy

最近十几年来,银河系已被确认为是一个棒旋星系,而不是无棒结构的普通旋涡星系。银河系内区的棒结构可以通过各类示踪源来加以探测,并进而确定其结构参数等观测特征。

The presence of a large scale bar in the inner Galaxy has been well established by various tracers since 1990, such as near infrared radiation （NIR） light, red clump giants, AGB stars and IRAS sources, and by different methods, such as bulge surface brightness, NIR star counts and kinematics of stars. It has been confirmed from various kinds of researches that our Milky Way should be morphologically catalogued as a barred spiral galaxy instead of a normal spiral one.